- update-scheduler: default interval 1 h (DASHBOARD_UPDATE_CHECK_INTERVAL_MS and its 60 s floor kept);
a scheduled tick with no /ws client is skipped, and the next browser to connect gets one catch-up
check when the last one is stale (websocket.js onConnection). Manual check unchanged.
- db-retention.js: shared session purge (used by POST /api/settings/cleanup too), opt-in
AGENTHUB_RETENTION_DAYS applied by the hourly maintenance in 25-session transactions with yields
(max 5000/run), bounded incremental_vacuum when the freelist is large, and a manual Compact
(VACUUM in a worker, converting to auto_vacuum=INCREMENTAL).
- db.js: new databases are INCREMENTAL; an existing one up to 32 MB is converted at startup.
- GET/PUT /api/settings/retention, POST /api/settings/compact (confirm: true); Settings → Data →
Session cleanup gets the Automatic cleanup control and Compact now (en + vi).
